Gdk.CursorGetTextureCallback
Description: Reference for Gdk.CursorGetTextureCallback

### Function

# GdkCursorGetTextureCallback

#### Declaration

    GdkTexture*
    (* GdkCursorGetTextureCallback) (
      GdkCursor* cursor,
      int cursor_size,
      double scale,
      int* width,
      int* height,
      int* hotspot_x,
      int* hotspot_y,
      gpointer data
    )

#### Description [src]

The type of callback used by a dynamic `GdkCursor` to generate a texture for the cursor image at the given `cursor_size` and `scale`.

The actual cursor size in application pixels may be different from `cursor_size` x `cursor_size`, and will be returned in `width`, `height`. The returned texture should have a size that corresponds to the actual cursor size, in device pixels (i.e. application pixels, multiplied by `scale`).

This function may fail and return `NULL`, in which case the fallback cursor will be used.

#### Parameters

`cursor`

  Type: `GdkCursor`

  The `GdkCursor`.

  The data is owned by the caller of the function.

`cursor_size`

  Type: `int`

  The nominal cursor size, in application pixels.

`scale`

  Type: `double`

  The device scale.

`width`

  Type: `int*`

  Return location for the actual cursor width, in application pixels.

  The argument will be set by the function.

`height`

  Type: `int*`

  Return location for the actual cursor height, in application pixels.

  The argument will be set by the function.

`hotspot_x`

  Type: `int*`

  Return location for the hotspot X position, in application pixels.

  The argument will be set by the function.

`hotspot_y`

  Type: `int*`

  Return location for the hotspot Y position, in application pixels.

  The argument will be set by the function.

`data`

  Type: `gpointer`

  User data for the callback.

  The argument can be `NULL`.
  The data is owned by the caller of the function.

#### Return value

Type: `GdkTexture`

The cursor image, or `NULL` if none could be produced.

The caller of the function takes ownership of the data, and is responsible for freeing it.
The return value can be `NULL`.